Peripheral Tunnels Propeller With Alternative Balance

Abstract

This disclosure is related with propeller noise and cavitation abatement in applications like propulsion, ventilation, pumping or turbine systems on fluids by novel techniques that allows stronger propellers with improved laminar flow by means of a propeller which consists on a rotating cylindrical block or a truncated substantially conical block with one or more tunnels around it rotational axis, said block also may have flow-guiding structures at both ends that help to keep the fluid's laminar flow when it is mixing fluids with its environment, having the rotating block tunnels with either substantially circular shaped cross-section or variable shape cross-section from substantially circular to irregular oval measured in perpendicular plane to the rotational axis whereby it smoothly accelerates fluid or gas by means of either centrifugal or axial movement, also including Dynamic Balance or Imbalance or Torque Modulation Means that modulate specific vibrations which generates sound waves.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This is an improvement to invention in U.S. Pat. No. 9,157,324 issued Oct. 13, 2015 previously application Ser. No. 12 / 838,343, filed Jul. 16, 2010 and provisional Application No. 61 / 228,133 filed on Jul. 23, 2009 both filed by the Applicant. This application claims priority on the provisional Application No. 62 / 222,887 filled on Sep. 24, 2015 under 35 USC §119(e) and 120. The disclosure of said patent is hereby incorporated by reference into the present application.BACKGROUND OF THE INVENTION[0002]Field of Invention[0003]The invention disclosed herein relates to propeller improvement, particularly to noise and cavitation abatement on propellers used on marine propulsion, fluid pumps, fans, and power turbines. Noise is always undesirable collateral of machine function, is source of illness, operational restrictions, and service life shortened on devices affected by noise. It is also a security concern to deal with when quiet operation is ...

AI Technical Summary

Benefits of technology

The present invention achieves its goal of reducing noise by using a rotating cylindrical tunnel with a circular cross-section. The design of the cross-section minimizes turbulence, which helps in reducing noise and improving the efficiency of the device. Additionally, embodiments of the invention comprising conical structures provide a more effective propeller action by taking advantage of the centrifugal force. The invention allows for easier mass production and minimizes noise and turbulence caused by hitting against the walls of the chamber.

Problems solved by technology

A common cause of noise is created by the fluid's turbulence, cavitation and the vibration of the propellers' blades.

Turbulence often in the blade itself, the flat shape of a blade in circular movement generates parasite waves that generate turbulence.

This turbulence generates noise when the fluid knocks against the blade's surface or other structures near the propeller.

The cavitation causes shock waves that are a powerful noise source.

As expected, this avoids the shock waves but introduces a new source of noise to the system due the turbulence generated by such gas (see U.S. Pat. No. 4,188,906 and its citations).

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